Borehole sampler



Patented J I James S. Cramp,

Stanfield 011 De ciop ration oi Dela Application "Q Ll. T ment Co r .si No. 354,658

7 (on; lea-1e The present invention is directed adapted to be carried on a wire line for procuring a sample of borehole fluid under pressure and bringing said sample to the surface without any release in pressure.

The principal object of the present invention is the provision of a device of the character described having a sample chamber provided with an inlet port, means for rupturing the disc in the borehole. v

An additional object of the present invention is the provision of a device to a device a device accordvertical section; view of the lower countered in the borehole.

Carried by the lower end bushing l longitudinal passage ll, larger central passage i8 communicating with a in the main portion of a longitudinal passage 20 arranged in its annular wall connecting passage l8 with the interior oi cylinder M.

as ram pressed. against its The skirt portion IQ of the bushing carries a nipple 2| seat by a spring 21.

Nipple it has a central passage in which is provided a shoulder 28 on which is arranged a metaldisc, preferably made of steel, 29, which is held in place by a bolt having a central age 8| in alignment with the central passage of the nipple 2|. The lower end of nipple 2| carries a nose plug 32 communication with Screwed into the lower face of the check valve 34 is a spear 34 which is of such length that it penetrates disc 29 when the check valve 24 is on its seat. The disc 29 is of such strength that the end of a spring 89. The other end of the spring is anchored to a similar bolt 40 fixed in the longia cylindrical weight member 62 which is slidingly arranged on the bars 85, which serve as guide rods. It will be apparent that if the entire assembly is given an upward ierk the inertia of the weight member Q2 causes it to deliver an impact to the stem 25 which serves to rupture the disc 29.

In the drawing the spear is shown protruding through the disc. It will be understood, however, that when the device is lowered into the borehole the point will rest on top of the disc which has a central passage the central passage 3|.

with the needle valve '35111 closed position. Whenthe sampling point is reached, the wire line is given an upwards jerk and then the device is permitted to riit until a sample is coldisc 29 is ruptured the pressure of the formation fluid will force the check valve 24 of! its seat and the fluid will pass through passage 20 .into the interior of the cylinder until the pressure temal pressure when the spring 21 will force the check valve back onto its seat. In order that liquid may pass through the disc! it is desirable to make the spear of such configurait punctures in the disc. For example, the stabbing point may be conical with longitudinal grooves, or it may have longitudinal ribs arranged on it. After the sample is collected and withdrawn from the borehole, the cap is removed, needle valve I3 is opened, and the liquid sample drawn through passage 8 by first removing plug 9. It is usually advisable to remove the plug before opening the needle valve.

' The above described embodiment is not to be taken as the only possible embodiment of the present invention. It will be apparent that this form or the present invention'which is capable of assuming different forms by the substitution of equivalent elements for some of the elements described. Various forms of rupturing devices turing device will occur to those skilled in the art and are contemplated within the scope of the present invention.

The nature and objects of the present invenwhat is claimed as new and useful and is desired to be secured by Letters Patent is:

1. A device adapted to be carried by a wire line for collecting a liquid sample in a borehole ber, means for sealing of! said chamber includat any desired point operable by an upward jerk on the line carrying said device while said device bore hole.

line for collecting a liquid sample at any desired point in a borehole comprising a chamber, means lected. It will be understood thatflwhen the 5 inside this cylinder ll becomes equal to the extion that it will not completely fill the hole which 5 the valve 24 is back on its seat, the device is 9 and connect the device to a collection vessel particular embodiment is an illustration of one and devices for delivering an impact to the ruption having been thus described and illustrated,

ar carried by said check valve and adapted at any desired point therein comprising a chamlog a disc, and means for rupturing saiddisc" 2. a device adapted to be carried by tea, 5

for sealing the lower end of said chamber comprising a disc, a speararranged within said chamber in position to puncture said disc, and

means for delivering an impact to said spear upon the application of a jar to the device while saiddevice is freely suspended by said wire line in said bore hole.

3. A device adapted to be carried by a wire line for collecting a liquid sample at any desired point in-a borehole comprising a chamber, a valve at the upper end of said chamber, means for sealing the lower end of said chamber comprising a disc, a spear arranged in said chamber in position to puncture said disc and means for delivering an impact to said spear upon the application of a Jar to the devicewhile said device is freely suspended by said wire line in said here hole.

'4. A device adapted to be carried by a wire line for collecting a liquid sample at any desired point in a borehole comprising a chamber, means for sealing the lower end of said chamber comprising adisc, a spear arranged in said chamber in position to puncture said disc, 9. weight suspended within said chamber above said spear and means for causing said weight to impinge upon said spear upon the application 01' a jar to the device. 7

' A} deviceaccordingto claim 4 in which the weight is slidingly arranged on guide rods fixed in the chamber and is suspended by a spring.

' 6. A device adapted to be carried by a wire line tor-collecting a'liquid sample at any desired point in a borehole comprising a chamber, means tor sealingth'e lower end of said chamber comprising a check valve normally pressed on its seat by a spring, a passage extending from c said chamber to the exterior of the device and controlled. by said check valve, a disc arranged across said passage below said check valve, a

Ito rest on said discand hold said check valve 01! its seat, and means for delivering an impact to said spear upon the application or a jar to said device whereby the disc is ruptured by the spear. 'l. A device according'to claim 6 in which the 'check 'valve is carried on a siidable stem and the means for delivering an impact to the spear is freely suspended by said wire line in said aiiveisht r dn he chamber in spaced relation to said stem and adapted to be thrust 'against'the end 01' said stem upon the applica- 

